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PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED 

Rename DPM_FLAG_LEAVE_SUSPENDED to DPM_FLAG_MAY_SKIP_RESUME which
matches its purpose more closely.

No functional impact.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rafael J. Wysocki 2020-04-18 18:53:20 +02:00
parent e07515563d
commit 2a3f34750b
6 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/driver-api/pm/devices.rst
View File

@ -803,7 +803,7 @@ general.]
However, it often is desirable to leave devices in suspend after system
transitions to the working state, especially if those devices had been in
runtime suspend before the preceding system-wide suspend (or analogous)
transition. Device drivers can use the ``DPM_FLAG_LEAVE_SUSPENDED`` flag to
transition. Device drivers can use the ``DPM_FLAG_MAY_SKIP_RESUME`` flag to
indicate to the PM core (and middle-layer code) that they prefer the specific
devices handled by them to be left suspended and they have no problems with
skipping their system-wide resume callbacks for this reason. Whether or not the
@ -825,7 +825,7 @@ device really can be left in suspend.
For devices whose "noirq", "late" and "early" driver callbacks are invoked
directly by the PM core, all of the system-wide resume callbacks are skipped if
``DPM_FLAG_LEAVE_SUSPENDED`` is set and the device is in runtime suspend during
``DPM_FLAG_MAY_SKIP_RESUME`` is set and the device is in runtime suspend during
the ``suspend_noirq`` (or analogous) phase or the transition under way is a
proper system suspend (rather than anything related to hibernation) and the
device's wakeup settings are suitable for runtime PM (that is, it cannot

2
Documentation/power/pci.rst
View File

@ -1029,7 +1029,7 @@ into D0 going forward), but if it is in runtime suspend in pci_pm_thaw_noirq(),
the function will set the power.direct_complete flag for it (to make the PM core
skip the subsequent "thaw" callbacks for it) and return.
Setting the DPM_FLAG_LEAVE_SUSPENDED flag means that the driver prefers the
Setting the DPM_FLAG_MAY_SKIP_RESUME flag means that the driver prefers the
device to be left in suspend after system-wide transitions to the working state.
This flag is checked by the PM core, but the PCI bus type informs the PM core
which devices may be left in suspend from its perspective (that happens during

2
drivers/acpi/acpi_tad.c
View File

@ -624,7 +624,7 @@ static int acpi_tad_probe(struct platform_device *pdev)
*/
device_init_wakeup(dev, true);
dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND |
DPM_FLAG_LEAVE_SUSPENDED);
DPM_FLAG_MAY_SKIP_RESUME);
/*
* The platform bus type layer tells the ACPI PM domain powers up the
* device, so set the runtime PM status of it to "active".

2
drivers/base/power/main.c
View File

@ -1247,7 +1247,7 @@ Skip:
* to be skipped.
*/
if (atomic_read(&dev->power.usage_count) > 1 ||
!(dev_pm_test_driver_flags(dev, DPM_FLAG_LEAVE_SUSPENDED) &&
!(dev_pm_test_driver_flags(dev, DPM_FLAG_MAY_SKIP_RESUME) &&
dev->power.may_skip_resume))
dev->power.must_resume = true;

4
drivers/i2c/busses/i2c-designware-platdrv.c
View File

@ -357,12 +357,12 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
if (dev->flags & ACCESS_NO_IRQ_SUSPEND) {
dev_pm_set_driver_flags(&pdev->dev,
DPM_FLAG_SMART_PREPARE |
DPM_FLAG_LEAVE_SUSPENDED);
DPM_FLAG_MAY_SKIP_RESUME);
} else {
dev_pm_set_driver_flags(&pdev->dev,
DPM_FLAG_SMART_PREPARE |
DPM_FLAG_SMART_SUSPEND |
DPM_FLAG_LEAVE_SUSPENDED);
DPM_FLAG_MAY_SKIP_RESUME);
}
/* The code below assumes runtime PM to be disabled. */

6
include/linux/pm.h
View File

@ -547,7 +547,7 @@ struct pm_subsys_data {
* NO_DIRECT_COMPLETE: Do not apply direct-complete optimization to the device.
* SMART_PREPARE: Check the return value of the driver's ->prepare callback.
* SMART_SUSPEND: No need to resume the device from runtime suspend.
* LEAVE_SUSPENDED: Avoid resuming the device during system resume if possible.
* MAY_SKIP_RESUME: Avoid resuming the device during system resume if possible.
*
* Setting SMART_PREPARE instructs bus types and PM domains which may want
* system suspend/resume callbacks to be skipped for the device to return 0 from
@ -562,13 +562,13 @@ struct pm_subsys_data {
* invocations of the ->suspend_late and ->suspend_noirq callbacks provided by
* the driver if they decide to leave the device in runtime suspend.
*
* Setting LEAVE_SUSPENDED informs the PM core and middle-layer code that the
* Setting MAY_SKIP_RESUME informs the PM core and middle-layer code that the
* driver prefers the device to be left in suspend after system resume.
*/
#define DPM_FLAG_NO_DIRECT_COMPLETE BIT(0)
#define DPM_FLAG_SMART_PREPARE BIT(1)
#define DPM_FLAG_SMART_SUSPEND BIT(2)
#define DPM_FLAG_LEAVE_SUSPENDED BIT(3)
#define DPM_FLAG_MAY_SKIP_RESUME BIT(3)
struct dev_pm_info {
pm_message_t power_state;